Battery module

Abstract

A battery module includes a battery cell; a case housing the battery cell, the case including a conductive material; a bus bar electrically connected to the battery cell, the bus bar including a terminal exposed to outside of the case; and a barrier disposed between the terminal and the case, wherein the barrier comprises a groove in an end of the barrier.

What is claimed is: 
     
         1 . A battery module comprising:
 a battery cell;   a case housing the battery cell, the case including a conductive material;   a bus bar electrically connected to the battery cell, the bus bar including a terminal exposed to outside of the case; and   a barrier disposed between the terminal and the case, wherein the barrier includes a groove in an end of the barrier.   
     
     
         2 . The battery module of  claim 1 , wherein the barrier is disposed in a space separated between the terminal and the case in a first direction, and extends in a second direction, perpendicular to the first direction, and
 the groove is formed in an end of the barrier in the second direction.   
     
     
         3 . The battery module of  claim 2 , wherein the groove includes a depth in the second direction. 
     
     
         4 . The battery module of  claim 1 , further comprising a cover disposed on the terminal. 
     
     
         5 . The battery module of  claim 1 , wherein the barrier is configured to surround a peripheral edge of the terminal. 
     
     
         6 . The battery module of  claim 5 , wherein the groove extends along the end of the barrier. 
     
     
         7 . The battery module of  claim 6 , further comprising a cover disposed on the barrier,
 wherein the cover comprises a protrusion inserted into the groove of the barrier.   
     
     
         8 . The battery module of  claim 1 , wherein at least a portion of the barrier is configured such that a creepage distance between the terminal and the case is 12.5 mm or more, and is less than or equal to a surface distance or a thickness of the barrier. 
     
     
         9 . The battery module of  claim 2 , wherein the groove is provided as a plurality of grooves formed between the terminal and the case. 
     
     
         10 . The battery module of  claim 7 , wherein the cover further comprises a hook formed in an end thereof, and
 wherein the barrier comprises a locking portion accommodating the hook.   
     
     
         11 . A battery module comprising:
 a plurality of battery cells stacked within a case;   the case which includes a conductive material;   an internal bus bar electrically connecting the plurality of the battery cells, the internal bus bar including at least one terminal protruding out of the case and configured to be coupled with an external bus bar;   a barrier disposed between the terminal and the case, the barrier including at least one groove formed at a first end of the barrier;   and a cover disposed on the barrier, the cover comprising at least one protrusion inserted into the at least one groove of the barrier.